Useful. As the highest securities regulatory body in China, the telephone complaints of CSRC have corresponding authority and credibility. Investors should collect evidence related to the problem before using the telephone to complain about futures, including securities trading records, trading account information, capital flow and so on. Once a complaint about futures is entered into the central hotline during the complaint period, the regulatory authorities will verify it in time and give a reply and feedback as soon as possible within the scope of law enforcement. Therefore, it is useful for CSRC to complain about futures.